diff --git a/src/main.ts b/src/main.ts
index 0ca6db0..c5f8c23 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -316,6 +316,7 @@ export class Editor {
 
       // This is the modal to switch between universes
       if (event.ctrlKey && event.key === "b") {
+        event.preventDefault();
         this.hideDocumentation();
 				this.updateKnownUniversesView();
         this.openBuffersModal();